<!--
{
  "availability" : [
    "iOS: 16.0.0 - 17.0.0",
    "iPadOS: 16.0.0 - 17.0.0",
    "macCatalyst: 16.0.0 - 17.0.0",
    "macOS: 13.0.0 - 14.0.0",
    "tvOS: 16.0.0 - 17.0.0",
    "visionOS: 1.0.0 - 1.0.0"
  ],
  "documentType" : "symbol",
  "framework" : "Metal",
  "identifier" : "/documentation/Metal/MTLDevice/makeIOHandle(url:)",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Method",
  "symbol" : {
    "kind" : "Instance Method",
    "modules" : [
      "Metal"
    ],
    "preciseIdentifier" : "c:objc(pl)MTLDevice(im)newIOHandleWithURL:error:"
  },
  "title" : "makeIOHandle(url:)"
}
-->

# makeIOHandle(url:)

Creates an input/output file handle instance that represents a file at a URL.

```
func makeIOHandle(url: URL) throws -> any MTLIOFileHandle
```

## Parameters

`url`

The URL to a resource file in the file system.

## Return Value

A new [`MTLIOFileHandle`](/documentation/Metal/MTLIOFileHandle) instance if the method completes successfully;
otherwise Swift throws an error and Objective-C returns `nil`.

## Discussion

For information about using input/output command queues and file handles, see [Resource loading](/documentation/Metal/resource-loading).

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)